Connection structure of vehicle body

ABSTRACT

A connection structure of a vehicle body includes a roof side rail member extending in a longitudinal direction of the vehicle body, a roof rear cross member extending in a transverse direction of the vehicle body, and having an end coupled to a rear end of the roof side rail member, a rear pillar member extending in a vertical direction of the vehicle body, and having an upper portion connected to the rear end of the roof side rail member and aligned with the end of the roof rear cross member, and a cover bracket covering a portion where the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member are connected to each other, the cover bracket configured to be integrated with the portion in a single body.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Korean Patent Application No. 10-2019-0162908, filed on Dec. 9, 2019, which application is hereby incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates generally to a connection structure of a vehicle body.

BACKGROUND

In the case of a conventional monocoque-type vehicle body, multiple components are coupled to each other in a complex structure to construct a vehicle body. Shapes and coupling structures of the components are different for each vehicle model.

Therefore, in order to construct a vehicle body of one vehicle model, multiple molds are required for the manufacture of components for constructing the vehicle body. Furthermore, since the molds cannot be used in common to construct a vehicle body of another vehicle model, another group of molds should be manufactured.

As described above, in the case of manufacturing a vehicle body according to different assembly structures for each vehicle model and using a plurality of components, workability is decreased.

The foregoing is intended merely to aid in the understanding of the background of the present disclosure, and is not intended to mean that the present disclosure falls within the purview of the related art that is already known to those skilled in the art.

SUMMARY

The present disclosure relates generally to a connection structure of a vehicle body. Particular embodiments relate to a connection structure of an upper portion of a rear pillar (C pillar).

Accordingly, embodiments of the present disclosure provide a connection structure of a vehicle body, the connection structure being configured such that a component corresponding to a rear pillar (C pillar) of a vehicle may be easily assembled to a roof and a floor of the vehicle, and may be connected thereto with excellent strength and rigidity, when a modularized space frame vehicle body is constructed.

According to one embodiment of the present disclosure, there is provided a connection structure of a vehicle body. The connection structure includes a roof side rail member extending in a longitudinal direction of the vehicle body, a roof rear cross member extending in a transverse direction of the vehicle body, and having an end coupled to a rear end of the roof side rail member, a rear pillar member extending in a vertical direction of the vehicle body, and having an upper portion connected to the rear end of the roof side rail member while being aligned with the end of the roof rear cross member, and a cover bracket covering a portion where the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member are connected to each other, the cover bracket to be integrated with the portion in a single body.

The upper portion of the rear pillar member may be directly coupled and connected to the rear end of the roof side rail member.

A structure in which the upper portion of the rear pillar member is directly coupled to the rear end of the roof side rail member may be a structure configured such that an upper end of the rear pillar member may extend into a straight line shape along a longitudinal direction of the roof side rail member and an upper end surface thereof may be directly coupled to the rear end of the roof side rail member. A structure in which the upper portion of the rear pillar member is directly coupled to the rear end of the roof side rail member may be a structure configured such that the upper end of the rear pillar member may be provided as a reinforcement part that may be bent along the longitudinal direction of the roof side rail member, and the reinforcement part may be coupled to the rear end of the roof side rail member in a surface contact manner.

When the upper portion of the rear pillar member is directly coupled to the rear end of the roof side rail member, a first reference line passing through a center of the connection structure along a longitudinal direction of the roof side rail member, a second reference line passing through the center of the connection structure along a longitudinal direction of the roof rear cross member, and a third reference line passing through the center of the connection structure along a longitudinal direction of the rear pillar member may be connected together to meet at one point.

The upper portion of the rear pillar member may be connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.

A structure in which the upper portion of the rear pillar member is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member may be a structure configured such that an upper end of the rear pillar member extending into a straight line shape along a longitudinal direction of the roof side rail member may be connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member. A structure in which the upper portion of the rear pillar member is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member may be a structure configured such that the upper end of the rear pillar member may be provided as a reinforcement part that may be bent along the longitudinal direction of the roof side rail member and the reinforcement part may be connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.

The cover bracket may include a first cover bracket provided at an inside of the vehicle body to integrally cover the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member, a second cover bracket provided at an outside of the vehicle body to integrally cover the rear end of the roof side rail member and the end of the roof rear cross member, and a third cover bracket provided at the outside of the vehicle body to integrally cover the rear end of the roof side rail member and the upper portion of the rear pillar member.

The second cover bracket and the third cover bracket may be coupled to each other without a gap remaining therebetween, as the second cover bracket and the third cover bracket are in contact with each other at the roof side rail member outside the vehicle body and are connected to each other in a flat surface-contact manner.

The first cover bracket and the third cover bracket may be disposed to be overlapped with each other, thus providing a flange part having a predetermined area. The flange part may be disposed at a portion between the rear end of the roof side rail member and the upper portion of the rear pillar member.

When a reinforcement part that may be bent along a longitudinal direction of the roof side rail member is provided at an upper end of the rear pillar member, the flange part may be provided to integrally cover the reinforcement part.

According to an embodiment of the present disclosure, when a modularized space frame vehicle body is constructed, the rear pillar member corresponding to a rear pillar (C pillar) of a vehicle can be easily connected to a roof and a floor of a vehicle body with an easy assembly process and with excellent strength and rigidity. Accordingly, the connection structure of embodiments of the present disclosure can secure stronger coupling force, strength, and rigidity, and be improved in durability.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objectives, features, and other advantages of the present disclosure will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a view showing a modularized space frame vehicle body;

FIG. 2 is a view showing an upper portion of a rear pillar member, as a connection structure of a vehicle body according to embodiments of the present disclosure;

FIG. 3 is a bottom perspective view of FIG. 2;

FIG. 4 is a view showing an embodiment in which a reinforcement part applied to an upper end of a rear pillar member is directly coupled to a roof side rail member according to embodiments of the present disclosure;

FIG. 5 is a view showing a rear pillar member in a state where an upper end of the rear pillar member is spaced apart from a roof side rail member according to embodiments of the present disclosure;

FIG. 6 is a view showing an embodiment in which a reinforcement part applied to an upper end of a rear pillar member is spaced apart from a roof side rail member according to embodiments of the present disclosure; and

FIGS. 7A-7C show embodiments in which the connection structure of a vehicle body is applied to various vehicle body structures.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

Hereinbelow, a connection structure of a vehicle body according to an exemplary embodiment of the present disclosure will be described with reference to the accompanying drawings.

FIG. 1 is a view showing a modularized space frame vehicle body. Referring to FIG. 1, a floor assembly 109 includes a front apron assembly 101, a dash assembly 103, a center floor assembly 105, and a rear floor assembly 107. An upper assembly 119 includes a side assembly 111, a quarter assembly 113, a back assembly 115, and a roof carrier 117. When the floor assembly 109 and the upper assembly 119 are assembled, a skin assembly 127, including a fender 121, a side-outer 123, and a roof panel 125, is coupled thereto to construct the space frame vehicle body.

For reference, the above description of the drawing in FIG. 1 is only for easy understanding of the configuration of the space frame vehicle body mentioned in the present disclosure, and it does not represent an assembly order of compartments constituting an actual space frame vehicle body. The actual assembly order may vary depending on various situations.

The roof carrier 117 includes roof side tubes 129, a cowl 131, middle roof rails 133, and a rear roof rail 135 that form a space frame structure. The roof side tubes 129 are at opposite sides of a vehicle, and the cowl 131, the middle roof rails 133, and the rear roof rail 135, which are provided between the roof side tubes 129 to connect the roof side tubes 129 to each other, are formed in a hollow closed tube structure. As the roof side tubes 129 are expanded and contracted in a longitudinal direction of a vehicle body, and the cowl 131, the middle roof rails 133, and the rear roof rail 135 are expanded and contracted in a transverse direction of the vehicle body, the roof carrier 117 may be easily transformed and applied to various vehicle types and various vehicle models.

The front apron assembly 101, the dash assembly 103, the center floor assembly 105, and the rear floor assembly 107, which are modularized so as to form the floor assembly 109, are assembled by varying lengths or widths thereof. Thus, the floor assembly 109 is easily transformed and applied to various vehicle types and various vehicle models.

As the roof carrier 117 and the floor assembly 109 are transformed, other components may be assembled by adjusting shapes or sizes thereof. Accordingly, it is easy to develop a vehicle body suitable for a new type or model of a vehicle, so that the development of the new vehicle type may be easy, and the vehicle body structure may be effectively applied to small quantity batch production.

Meanwhile, the skin assembly 127 including the fender 121, the side-outer 123, and the roof panel 125 may be made of various materials such as carbon fiber reinforced plastics (CFRP) as well as conventional steel plastics. Thus, each shape of the components may be freely transformed depending on vehicle types or vehicle models so as to be applied to the above-described space frame, and various vehicles may be easily manufactured.

The connection structure for a vehicle body may be configured to be applied to the space frame vehicle body that has the above-described configuration. As shown in the embodiment of FIGS. 2 and 3, the connection structure for a vehicle body includes a roof side rail member 10 extending in a longitudinal direction of a vehicle body, a roof rear cross member 20 extending in a transverse direction of the vehicle body and having an end coupled to a rear end of the roof side rail member 10, a rear pillar member 30 extending in a vertical direction of the vehicle body and having an upper portion coupled to the rear end of the roof side rail member 10 while being aligned with the end of the roof rear cross member 20, and a cover bracket 40 formed in a plate, and covering a portion where the rear end of the roof side rail member 10, the end of the roof rear cross member 20, and the upper portion of the rear pillar member 30 are connected to each other, the cover bracket 40 to be integrated with the portion in a single body.

That is, the roof side rail member 10 is interposed between the roof rear cross member 20 and the rear pillar member 30, and the roof rear cross member 20 and the rear pillar member 30 are connected at right angles to the roof side rail member 10, respectively. Further, the cover bracket 40 covers and reinforces the portion where the rear end of the roof side rail member 10, the end of the roof rear cross member 20, and the upper portion of the rear pillar member 30 are connected to each other, thereby constructing the connection structure of a vehicle body.

The roof side rail member 10, the roof rear cross member 20, and the rear pillar member 30 may all be formed as hollow tubes or pipes to construct the space frame structure.

In FIG. 1, the roof side rail member 10 may be a configuration corresponding to the roof side tubes 129, and the roof rear cross member 20 may be a configuration corresponding to the rear roof rail 135.

Further, the rear pillar member 30 may correspond to a component called a C pillar or a rear pillar of a general vehicle.

As shown in FIG. 1, the rear pillar member 30 may be aligned and connected to a portion at a rear end of the roof side tubes 129, e.g., the portion to which the rear roof rail 135 is connected, and the cover bracket 40 may be coupled to the space frame structure to cover a connected portion where the above-mentioned three components are connected to each other.

In addition, the connection structure of a vehicle body may be used such that the rear pillar member 30 is coupled to an object such as the floor assembly 109 in FIG. 1.

That is, the connection structure may correspond to a structure in which a lower end of the rear pillar member 30 is coupled to a rear end of a side sill that is positioned at the side of the floor assembly 109.

The floor assembly 109 as described above may be provided with a cross member that is different from the above-mentioned component and formed in the transverse direction of the vehicle body. Accordingly, by corresponding the cross member provided in the floor assembly 109 to the rear roof rail 135 provided in the roof carrier 117 in FIG. 1, the connection structure of a vehicle body in FIG. 2 may be used as the same structure in which the rear pillar member 30 is coupled to the rear end of the side sill of the floor assembly 109, while only a direction of the connection structure is changed up and down.

Practically, embodiments of the present disclosure are expressed with the concept including both when the rear pillar member 30 is coupled to the rear end of the roof side tubes 129 and when coupled to the rear end of the side sill of the floor assembly 109, as described above. That is, the connection structure of a vehicle body of the present disclosure may be commonly used in structures in which the rear pillar member 30 formed in the vertical direction of the vehicle body is coupled to both an upper side and a lower side of the vehicle body.

According to an embodiment of the present disclosure, the roof rear cross member 20 is disposed in the transverse direction of the vehicle body perpendicular to the roof side rail member 10. The end of the roof rear cross member 20 is connected to the roof side rail member 10 in a manner of being directly coupled to the rear end of the roof side rail member 10.

Coupling between the roof rear cross member 20 and the roof side rail member 10 may be performed by welding, structural adhesives, or separate coupling members.

As the end of the roof rear cross member 20 and the rear end of the roof side rail member 10 are directly coupled to each other, a coupled portion between the roof rear cross member 20 and the roof side rail member 10 may provide sufficient strength and rigidity.

According to an embodiment of the present disclosure, the rear pillar member 30 is disposed at a right angle with respect to the roof side rail member 10 in the vertical direction of the vehicle body. The upper portion of the rear pillar member 30 may be directly coupled to the rear end of the roof side rail member 10 in a form in which the upper portion of the rear pillar member 30 is aligned with the end of the roof rear cross member 20.

Coupling between the rear pillar member 30 and the roof side rail member 10 may be performed by welding, structural adhesives, or separate coupling members.

As described above, a structure in which the upper portion of the rear pillar member 30 is directly coupled to the rear end of the roof side rail member 10 may be one of the following structures. That is, there may be a structure in which an upper end of the rear pillar member 30 extends into a straight line shape along a longitudinal direction of the roof side rail member 10 and an upper end surface thereof is directly coupled to the rear end of the roof side rail member 10, as shown in FIG. 2. Alternatively, there may be a structure in which the upper end of the rear pillar member 30 is provided as a reinforcement part 31 that is bent along the longitudinal direction of the roof side rail member 10 and the reinforcement part 31 is coupled to the rear end of the roof side rail member 10 in a surface contact manner, as shown in FIG. 4.

When the upper end of the rear pillar member 30 is directly coupled to the rear end of the roof side rail member 10 as shown in FIG. 2, or when the rear pillar member 30 is coupled to the rear end of the roof side rail member 10 through the reinforcement part 31 that is bent in an L shape at the upper end of the rear pillar member 30, as shown in FIG. 4, the structure can provide sufficient strength and rigidity with respect to a coupled portion between the upper portion of the rear pillar member 30 and the rear end of the roof side rail member 10.

As shown in FIGS. 2 and 4, in the case of the structure in which the upper portion of the rear pillar member 30 is directly coupled to the rear end of the roof side rail member 10, a first reference line L1 passing through a center of the connection structure along the longitudinal direction of the roof side rail member 10, a second reference line L2 passing through the center thereof along a longitudinal direction of the roof rear cross member 20, and a third reference line L3 passing through the center thereof along a longitudinal direction of the rear pillar member 30 are connected together to meet at one point P1. Accordingly, the strength and rigidity of the coupled portion between the roof side rail member 10, the roof rear cross member 20, and the rear pillar member 30 may be increased, and in particular, the load may be properly distributed in various directions, thus improving the durability.

That is, the roof side rail member 10, the roof rear cross member 20, and the rear pillar member 30 are connected together, so that one end of the second reference line L2 and one end of the third reference line L3 meet at the point P1 with the first reference line L1.

As another embodiment, the structure may be configured such that the upper portion of the rear pillar member 30 may be spaced apart from the roof side rail member 10 in an arrangement of being aligned with the end of the roof rear cross member 20. At this point, the upper portion of the rear pillar member 30 may be connected to the roof side rail member 10 through the cover bracket 40, as shown in FIGS. 5 and 6.

The structure in which the upper portion of the rear pillar member 30 is spaced apart from the roof side rail member 10 and connected thereto through the cover bracket 40 is preferably applied to a structure requiring low rigidity or a structure requiring medium rigidity, and in this case, weight and manufacturing cost thereof may be reduced.

As described above, a structure in which the upper portion of the rear pillar member 30 is spaced apart from the rear end of the roof side rail member 10 and connected thereto through the cover bracket 40 may be one of the following structures. There may be a structure in which the upper end of the rear pillar member 30 extending into a straight line shape along the longitudinal direction of the roof side rail member 10 is spaced apart from the rear end of the roof side rail member 10 with having a predetermined gap G1 and connected thereto through the cover bracket 40, as shown in FIG. 5. Alternatively, there may be a structure in which the upper end of the rear pillar member 30 is provided as the reinforcement part 31 bent along the longitudinal direction of the roof side rail member 10, and the reinforcement part 31 is spaced apart from the rear end of the roof side rail member 10 with having a predetermined gap G2 and connected thereto through the cover bracket 40, as shown in FIG. 6.

As shown in FIG. 5, the structure, which is configured such that the upper end of the rear pillar member 30 extending in the strength line shape along the longitudinal direction of the roof side rail member 10 is spaced apart from the rear end of the roof side rail member 10 by the predetermined gap G1 and connected thereto through the cover bracket 40, is preferably applied to reduce weight and manufacturing cost in the structure requiring low rigidity.

As shown in FIG. 6, the structure, which is configured such that the reinforcement part 31 that is bent in the L shape at the upper end of the rear pillar member 30 is spaced apart from the rear end of the roof side rail member 10 by the predetermined gap G2, and connected thereto through the cover bracket 40, is preferably applied to reduce weight and manufacturing cost in the structure requiring medium rigidity.

The structure provided with the reinforcement part 31 at the rear pillar member 30 of FIG. 6 may secure relatively more strength and rigidity of the upper portion of the rear pillar member 30 than the structure without the reinforcement part 31 of FIG. 5.

The cover bracket 40 of an embodiment of the present disclosure includes a first cover bracket 41 provided at an inside of the vehicle body to integrally cover the rear end of the roof side rail member 10, the end of the roof rear cross member 20, and the upper portion of the rear pillar member 30, a second cover bracket 42 provided at an outside of the vehicle body to integrally cover the rear end of the roof side rail member 10 and the end of the roof rear cross member 20, and a third cover bracket 43 provided at the outside of the vehicle body to integrally cover the rear end of the roof side rail member 10 and the upper portion of the rear pillar member 30.

That is, the first cover bracket 41, the second cover bracket 42, and the third cover bracket 43 provide support by covering connected portions between the rear end of the roof side rail member 10, the end of the roof rear cross member 20, and the upper portion of the rear pillar member 30 at all directions in a surface-contact manner. Thus, the connected portions may provide sufficient strength and rigidity.

An outer edge of the second cover bracket 42 and an outer edge of the third cover bracket 43 are in contact with each other at the roof side rail member 10 outside the vehicle body and are connected to each other in a flat surface-contact manner. The second cover bracket 42 and the third cover bracket 43 are coupled to each other without a gap remaining therebetween. Accordingly, the second cover bracket 42 and the third cover bracket 43 may have a stronger coupling force.

The first cover bracket 41, the second cover bracket 42, and the third cover bracket 43 that form the cover bracket 40 may be coupled to the connection structure by being fixed by welding or structural adhesives, when the first cover bracket 41, the second cover bracket 42, and the third cover bracket 43 cover the connected portions where the end of the roof rear cross member 20, the upper portion of the rear pillar member 30, and the rear end of the roof side rail member 10 are coupled to each other.

The first cover bracket 41 and the third cover bracket 43 are disposed to be overlapped with each other, thus providing a flange part 44 that has a predetermined area. The flange part 44 is configured to be disposed at a portion between the rear end of the roof side rail member 10 and the upper portion of the rear pillar member 30. Accordingly, the connected portion between the rear end of the roof side rail member 10 and the upper portion of the rear pillar member 30 may have improved strength and rigidity.

Further, the flange part 44 is provided to integrally cover the reinforcement part 31 that is bent along the longitudinal direction of the roof side rail member 10 at the upper end of the rear pillar member 30. Thus, the reinforcement part 31 may provide sufficient coupling strength and rigidity.

The connection structure of a vehicle body as described above is configured such that the vertical length of the rear pillar member 30 may easily vary and be coupled to the rear end of the roof side rail member 10. Therefore, the connection structure may be easily applied to various structures of a vehicle body frame, as shown in FIGS. 7A-7C.

In FIGS. 7A-7C, various structures of a vehicle body frame are shown to be comparable to each other. In each structure of a vehicle body frame, circles A1 and C1 indicate joints provided to form each vehicle body frame. Among the circles, opposite ends of a component corresponding to the rear pillar member 30 of the present disclosure are indicated with solid circles C1, and the above-described connection structure of a vehicle body of the present disclosure may be applied to the solid circles C1.

That is, the connection structure of a vehicle body may be easily applied in common to the various vehicle types as shown in FIGS. 7A-7C, when the length variation of the rear pillar member 30 and the slight deformation are entailed. Accordingly, the development of new vehicle types may be carried out easily, and it is possible to provide technology infrastructure that may be effectively applied to small quantity batch production.

Hereinbefore, according to an embodiment of the present disclosure, in configuring a vehicle body structure of a modularized space frame type, the rear pillar member 30 that corresponds to a rear pillar (C pillar) of a vehicle is coupled to a roof and a floor of a vehicle body with easy assembly performance and excellent strength and rigidity. Accordingly, the connection structure can secure stronger coupling force, strength, and rigidity, and be improved in durability.

Although preferred embodiments of the present disclosure have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. 

What is claimed is:
 1. A connection structure of a vehicle body, the connection structure comprising: a roof side rail member extending in a longitudinal direction of the vehicle body; a roof rear cross member extending in a transverse direction of the vehicle body and having an end coupled to a rear end of the roof side rail member; a rear pillar member extending in a vertical direction of the vehicle body and having an upper portion directly coupled to the rear end of the roof side rail member and aligned with the end of the roof rear cross member; and a cover bracket covering a portion where the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member are connected to each other, the cover bracket configured to be integrated with the portion in a single body.
 2. The connection structure of claim 1, wherein an upper end of the rear pillar member extends into a straight line shape along a longitudinal direction of the roof side rail member and an upper end surface thereof is directly coupled to the rear end of the roof side rail member.
 3. The connection structure of claim 1, wherein an upper end of the rear pillar member includes a reinforcement part that is bent along the longitudinal direction of the roof side rail member, and wherein the reinforcement part is coupled to the rear end of the roof side rail member in a surface contact manner.
 4. The connection structure of claim 1, wherein a first reference line passing through a center of the connection structure along a longitudinal direction of the roof side rail member, a second reference line passing through the center of the connection structure along a longitudinal direction of the roof rear cross member, and a third reference line passing through the center of the connection structure along a longitudinal direction of the rear pillar member are connected together to meet at one point.
 5. The connection structure of claim 1, wherein the upper portion of the rear pillar member is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.
 6. The connection structure of claim 5, wherein an upper end of the rear pillar member extending into a straight line shape along a longitudinal direction of the roof side rail member is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.
 7. The connection structure of claim 5, wherein an upper end of the rear pillar member is provided as a reinforcement part that is bent along the longitudinal direction of the roof side rail member and the reinforcement part is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.
 8. A connection structure of a vehicle body, the connection structure comprising: a roof side rail member extending in a longitudinal direction of the vehicle body; a roof rear cross member extending in a transverse direction of the vehicle body and having an end coupled to a rear end of the roof side rail member; a rear pillar member extending in a vertical direction of the vehicle body and having an upper portion coupled to the rear end of the roof side rail member and aligned with the end of the roof rear cross member; and a cover bracket covering a portion where the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member are connected to each other, the cover bracket configured to be integrated with the portion in a single body, wherein the cover bracket comprises: a first cover bracket provided at an inside of the vehicle body to integrally cover the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member; a second cover bracket provided at an outside of the vehicle body to integrally cover the rear end of the roof side rail member and the end of the roof rear cross member; and a third cover bracket provided at the outside of the vehicle body to integrally cover the rear end of the roof side rail member and the upper portion of the rear pillar member.
 9. The connection structure of claim 8, wherein the second cover bracket and the third cover bracket are coupled to each other without a gap between them.
 10. The connection structure of claim 9, wherein the second cover bracket and the third cover bracket are in contact with each other at the roof side rail member outside the vehicle body and are connected to each other in a flat surface-contact manner.
 11. The connection structure of claim 8, wherein the first cover bracket and the third cover bracket are disposed to be overlapped with each other to provide a flange part having a predetermined area; and the flange part is disposed at a region between the rear end of the roof side rail member and the upper portion of the rear pillar member.
 12. The connection structure of claim 11, wherein, when a reinforcement part that is bent along a longitudinal direction of the roof side rail member is provided at an upper end of the rear pillar member, the flange part is provided to integrally cover the reinforcement part.
 13. A vehicle comprising: a vehicle body; a roof side rail member extending in a longitudinal direction of the vehicle body, the roof side rail member having a rear end; a roof rear cross member extending in a transverse direction of the vehicle body, the roof rear cross member having an end coupled to the rear end of the roof side rail member; a rear pillar member extending in a vertical direction of the vehicle body, the rear pillar member aligned with the end of the roof rear cross member and having an upper portion directly coupled to the rear end of the roof side rail member; and a cover bracket covering a portion where the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member are connected to each other.
 14. The vehicle of claim 13, wherein an upper end of the rear pillar member extends into a straight line shape along a longitudinal direction of the roof side rail member and an upper end surface thereof is directly coupled to the rear end of the roof side rail member.
 15. The vehicle of claim 13, wherein an upper end of the rear pillar member includes a reinforcement part that is bent along the longitudinal direction of the roof side rail member, and wherein the reinforcement part is coupled to the rear end of the roof side rail member in a surface contact manner.
 16. The vehicle of claim 13, wherein the upper portion of the rear pillar member is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.
 17. The vehicle of claim 16, wherein an upper end of the rear pillar member extending into a straight line shape along a longitudinal direction of the roof side rail member is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.
 18. The vehicle of claim 16, wherein an upper end of the rear pillar member is provided as a reinforcement part that is bent along the longitudinal direction of the roof side rail member, and wherein the reinforcement part is connected to the rear end of the roof side rail member through the cover bracket while being spaced apart from the rear end of the roof side rail member.
 19. The connection structure of claim 1, wherein the cover bracket comprises: a first cover bracket provided at an inside of the vehicle body to integrally cover the rear end of the roof side rail member, the end of the roof rear cross member, and the upper portion of the rear pillar member; a second cover bracket provided at an outside of the vehicle body to integrally cover the rear end of the roof side rail member and the end of the roof rear cross member; and a third cover bracket provided at the outside of the vehicle body to integrally cover the rear end of the roof side rail member and the upper portion of the rear pillar member.
 20. The connection structure of claim 19, wherein the second cover bracket and the third cover bracket are coupled to each other without a gap between them. 